Abstract: A cable connecting structure includes a cable connector connected to a cable, a back panel selectively provided with one or a plurality of projections depending on a connecting position of the cable connector, and a substrate assembly having first and second ends and having a plurality of movable sliders extending between the first and second ends. Each of the sliders has third and fourth ends. The third end of at least one of the sliders makes contact with the projection of the back panel and the fourth end thereof projects from the first end of the substrate assembly when the second end of the substrate assembly connects to the back panel. The cable connector has at least one recess which receives and accommodates the fourth end of the at least one of the sliders when the cable connector connects to the first end of the substrate assembly.